I've noticed when I use large object sizes like 100M with rados bench write, I get
rados -p data2 bench 60 write --no-cleanup -b 100M
Maintaining 16 concurrent writes of 104857600 bytes for up to 60 seconds or 0 objects
sec Cur ops started finished avg MB/s cur MB/s last lat avg lat
0 0 0 0 0 0 - 0
1 3 3 0 0 0 - 0
2 5 5 0 0 0 - 0
3 8 8 0 0 0 - 0
4 10 10 0 0 0 - 0
5 13 13 0 0 0 - 0
6 15 15 0 0 0 - 0
error during benchmark: -5
error 5: (5) Input/output error
An object_size of 32M works fine and the cluster seems otherwise fine.
Seems related to this issue http://lists.ceph.com/pipermail/ceph-users-ceph.com/2014-March/028288.html
But I didn't see a resolution for that.
Is there a timeout that is kicking in?
-- Tom Deneau
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